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North Stonington is a town in New London county in Connecticut. It was formed in 1807 from the following town or towns: Stonington. North Stonington is a part of the N. Stonington probate district and has been since 1835. Stonington was/were the previous chronological district or districts. For more information, contact the county at 40 Main St. North Stonington 06359-1612. On the attached map, New London is located at K5.